OPA121电源用的是+9V和-9V的线性稳压电源,输出端为什么总是输出10mV左右的杂波,
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输出有杂波请检查下PCB layout或电源干扰造成的,电源端需加去耦电容,去耦电容尽量靠近芯片电源引脚。